Improvement in device for preventing radiation op heat prom steam-pipes



l parts.

anat sala ,MRM ,with

/JAMES MCFARLAND, OF LOUISVILLE, KENTUCKY.

Leners Patent No. 91,652, dated June 22, 1869.

IMPROVEMENT IN DEVI/CE PQR PREVENTING- RADIATIN 0F HEAT FROM STEAM-PIPES.

The Schedule referred to in these Letters Patenti-1nd :staking part of the rsaune.

ville, in the county of Jefferson, and State of Ken? tuck-y, have invented a new and useful Improvement in Preventing the YRadiation of Heat; and I do hereby vdeclare that the following is afnll, clear, and exact description thereof, which will enable others skilled in the. art to make and usethe same, reference-being hadV to the accompanying drawings,pforming part of this specification. e p v `This invention relates to a new and useful device for preventing the condensation of steam in steam-pipes, in consequence ofthe radiation of heat therefrom, and for preventing the radiation of heat from stean1-pipesr by the devices hereinafter described.

In the accompanying plate of drawings- Figure -1 represents a longitudinal section of asteampipe connecting the boiler with the engine-cylinder, protected by a surrounding pipe, according to my invention. f

Figure 2 is a cross-section ot'v iig. 1, rthrough the line a: p

Similar letters of reference indicate ,corresponding The steam-hoiler and the cylinderofthe engine are shownin red color. Y

A is the steam-pipe, which, as seen in the drawing,

-is connected with the boiler, and which extends to the i steam-chest of the engine. Y

B is, the exhaust-pipe, which is connected with and surrounds the stealn-pipe A.

This exhaust-pipe is connected with the steam-pipe A, by means of an elbow, as seen at'C, and the exhaust steam is discharged into the annular space D, aronnd'the steam-pipe. Y

The steam is discharged from'the pipe B, through the short tube G, as shown. v

Any device may be employed for forming a steamtight joint between the two pipes.

. It will be seen that as the steam-supply pipe is sur--` rounded with steam, no condensation `can take place within the pipe where it is so protected, thus adding greatly to the eiiciencyof thesteam-boiler, and, consequently, resulting in a saving of fuel.

Having thus described my invention, I claim as new, and desire to secure by Lettere' Patenti The arrangement of the surrounding exhaust-pipe B, elbow C, and tube G, with the steam-pipe AV, connecting the boiler and steam-chest, as herein 'shown and described.

- Witnesses:

JOHN AsHERN, "Josera KNIGHT.

YJAMES MCFARLAND. 

